Galahad, sometimes referred to as Galeas or Galath, among other versions of his name, is a knight of King Arthur's Round Table and one of the three achievers of the Holy Grail in Arthurian legend. He is the illegitimate son of Sir Lancelot du Lac and Lady Elaine of Corbenic and is renowned for his gallantry and purity as the most perfect of all knights. Emerging quite late in the medieval Arthurian tradition, Sir Galahad first appears in the Lancelot–Grail cycle, and his story is taken up in later works, such as the Post-Vulgate Cycle, and Sir Thomas Malory's Le Morte d'Arthur. In Arthurian literature, he replaced Percival as the hero in the quest for the Holy Grail.

The Knights of the Round Table are the legendary knights of the fellowship of King Arthur that first appeared in the Matter of Britain literature in the mid-12th century. The Knights are an order dedicated to ensuring the peace of Arthur's kingdom following an early warring period, entrusted in later years to undergo a mystical quest for the Holy Grail. The Round Table at which they meet is a symbol of the equality of its members, who range from sovereign royals to minor nobles.